Paper-stuff pump.



No. 666,066.` Patented 1an. i5, 190|. l. P fmLLoN.

PAPER STUFF PUMP.

(Application led Nov. 14, 1899.)

.(No Model.)

More STATES PATENT FFICE.

IRWIN I). DILLON, OF LAWRENCE, MASSACHUSETTS, ASSIGNOR OF ONE- I-IALF TOHENRY O. KING, OF SAME PLACE.

PAPER-STU FF PUMP..

SPECIFICATION forming part of Letters Patent No. 666,089, dated January15, 1901. Application tied November 14, 1899. smalto. 736,906. iNomodel.)

To @ZZ whom t may con/cern;

Be it known that I. IRWIN P. DILLON, acitizen of the United States,residing at Lawrence, county of Essex, and State of Massachusetts, haveinvented an Improvement in Paper- Stuff Pumps, of which the followingdescription, in connection with the accompanying drawings, is aspecification, like letters on the drawings representing like parts.

The present invention is an -improvement in paper-stuff pumps such asare used in paper-mills for pumping up the paper-stu, the pump as hereinpartially shown being of the ball-valve kind, in which a rising andfalling ball or sphere operates to open and close the valve. In suchpumps the valve-seats wear out rapidly because of the incessant poundingthereon of the valves, and also the valves themselves frequently wearout, and as heretofore constructed these parts have not been readilyaccessible, and it has been necessary to take the entire pump more orless to pieces, and, in fact, in many cases to remove the pump itselfwhen either of its parts is worn out in order that they may be remediedor the pump replaced by a new one, thereby incurring much delay andconsiderable expense and trouble.

My invention has for its object the provision of means for the instantremoval of the valve-seat, either for inspection or repair or for thereplacing thereof by another one, and

means for the instant removal also of the valve when required.

In the drawings, Figure 1 is a vertical section on line l l, Fig. 2, ofa portion of a pump, sufticient details being shown to enable myinvention to be understood. Fig. 2 is a horizontal sectional view takenon the line 2 2, Fig. l.- Fig. 3 is a horizontal view taken on theirregular line 3 3, Fig. l.

As herein shown, the inlet for the paperstuif or other material which isto be pumped is located at or in the base a of the pump, and the pistona2 is indicated at the upper end d3 of the frame, my special valve-box bbeinglocated between these parts. The ballvalve b', normally closingagainst its seat b2, rises to permit the flow of pulp out through the.outlet hs to the other part of the pump. (Not herein shown.)

in the form of a ceutrally-apertured wedge' block or plate b5, which isalso placed in the recess or pocket b4, said tightening means beingnormally connected by a bolt h6 and nut 197 to a cap or plate bs,secured to the front of the recess b4 by suitable means, as by nuts b9,said cap or plate also preferably serving to close said recess tightly.At either side of the bolt h6 are set screws or bolts Z910 for properlyalining the wedge block b5 and wedging it tightly into proper position.

The class of pumps in question are used to convey paper-stuff, which, asis well known, is quite heavy and thick, so that when the valve is aboutto descend the backward flow of the stu tends to accelerate the movementofthe valve, and thereby increase the damage dueto pounding, and, on theother hand, inasmuch as the stuff is slow to move at the best itisnecessary that the valve should be raised readily from the valve-seat,and accordingly I make the valve hollow, as indicated in Fig. l, so thatit will rise readily from its seat and will likewise fall with the leastmomentum. Furthermore, this class of pumps as heretofore 'constructedgive considerable lateral play to the valve, so that the latter does notalways descend properly upon the valve-seat, but especially because ofthe lateral backward movement of the stufn while the valve is descendingthe valve strikes most frequently and severely upon the left-hand sideof the valve, Fig. l, and accordingly I have provided the valve-seatwith shoulders 512 in order that it may always maintain anaccurately-centered position irrespective of the position of the wedgeb5, and coperating with the shoulder Z912 and with the valve b' Iprovide a plurality of directing or seating ribs Z213, these ribs beingherein shown as four in number. As, therefore, the valve rises and fallsit is obliged to follow the same path in- IOO variably, irrespective ofwhether there is a severe side pressure due to the back HOW of the pulpor not. Furtherlnore, I have found that the Valve is quite variable inits movements, so that at times it will rise to such an extent that whenit falls it pounds the valveseat unduly, and accordingly I have providedan Overhanging bar or stop 1914, herein shown as extending from theupper end of one of the ribs 1913. This feature of the invention is Ofconsiderable practical importance for the reason that while it permitssufficient movement of the valve from its seat it prevents the valvefrom rising so far as to injure the valve-seat unduly by its fall.

In Order 'that the valve-seat may be quickly inspected at any timewit-hout removal and that the valve may be removed quickly withouttaking the pump to the maker, l have made the front 1915 of the valvebox or chest removable, and also inasmuch as the stop 1914 is poundedconsiderably by the valve I have mounted the same upon the removablepart 1915. These parts are held in by a yoke 1916 and bolt 1917, theyoke being secured by bolts and nuts 1918 tO the-frame Of the machine,as shown in Fig. 2.

In use if a valve becomes injured Or anything becomes permanently lodgedon the valve-seat so as to prevent the proper closing thereof theface-plate or front 1915 is quickly removed and the valve taken out andre paired or the valve-seat inspected and cleaned, whereupon the valve,Or if the latter is broken another one, is at Once put in place and thefront mounted again in position, whereupon the pump can resume its work,all with Only a few moments delay. If now the valve-seat should becomeworn down too thin for practical use Or should become broken Or injuredin any way, the cap or plate hs is loosened from the bottom frame andthe tightening means 195 pulled out, so as to permit the valveseat to belowered and removed from the recess 194, whereupon another valve-seatmay be quickly inserted and wedgedA into proper p0- sitiOn by thewedge-block 195, said valve-seat automatically centering itself byreason of its conical iiange 1912. This iange also provides aconsiderable depth Ofvmetal to be worn away before the seat becomesuseless'.

The valve being hollow and weighted tO correspond to the quality anddensity of stu being pumped rises readily and falls with a minimumVlolOW upon the seat, being always sure to strike the seat accuratelybecause of the direction-ribs 1913 and the accurate centering of thevalve-seat relatively thereto.

I do not intend to restrict myself tothe details herein shown anddescribed otherwise than as hereinafter expressed in the claims,inasmuch as very many changes may be made without departing from thespirit of my invention, nor do I intend to restrict my invention in allcases to a pump used for paperstuff. j

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. A .pump having a valve-chamber containing a guided valve, and anindependent recess opening externally beneath said valvechamber, aremovable valve-seat located in said recess and independent of saidvalvechamber and provided with centering means for guiding saidvalve-seat into centered position and shifting the same when necessaryrelatively to said valve and transversely of the valve-chamber in beingtightened into passage between said valve-chamber and the pump passagebelow said chamber, said wedge block having its upper face corresponding in inclination to said valve-seat and having its lower side in thesame plane as the bottom of said recess, said valve-seat and blockcoperating with said chest and recess to form aclosed passage.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

IRWIN P. DILLON.

Witnesses:

GEO. H. MAXWELL, GEO. W. GREGORY.

IOO

